The Boston Red Sox moved to try to improve the worst pitching staff in the American League when they fired pitching coach Juan Nieves on Thursday. General manager Ben Cherington made the announcement and said another move involving reliever Edward Mujica was expected Friday when the Red Sox start a three-game series at Toronto. No replacement for Nieves was named, but Cherington said he had a small list of prospects that included at least one person from inside the organization and at least one from outside. Cherington said he and manager John Farrell felt the team needed to ''have a different voice in that particular position.'' In his first season as a major league pitching coach in 2013, Nieves guided a staff that had a 3.79 ERA and a team-record 1,294 strikeouts and helped the Red Sox win the World Series. More...